package com.nercel.dsj.gksales.shiro.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtil {
	public final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");

	public final static SimpleDateFormat sdfDay = new SimpleDateFormat(
			"yyyy-MM-dd");

	public final static SimpleDateFormat sdfDays = new SimpleDateFormat(
	"yyyyMMdd");

	public final static SimpleDateFormat sdfTime = new SimpleDateFormat(
			"yyyy-MM-dd HH:mm:ss");

	/**
	 * 获取YYYY格式
	 * 
	 * @return
	 */
	public static String getYear() {
		return sdfYear.format(new Date());
	}

	/**
	 * 获取YYYY-MM-DD格式
	 * 
	 * @return
	 */
	public static String getDay(Date date) {
		return sdfDay.format(date == null ? new Date() : date);
	}
	
	/**
	 * 获取YYYYMMDD格式
	 * 
	 * @return
	 */
	public static String getDays(){
		return sdfDays.format(new Date());
	}

	public static String formatDate(Date date,SimpleDateFormat dateFormat){
		return dateFormat.format(date);
	}

	/**
	 * 获取YYYY-MM-DD HH:mm:ss格式
	 * 
	 * @return
	 */
	public static String getTime() {
		return sdfTime.format(new Date());
	}

	/**
	* @Title: compareDate
	* @Description: TODO(日期比较，如果s>=e 返回true 否则返回false)
	* @param s
	* @param e
	* @return boolean  
	* @throws
	* @author luguosui
	 */
	public static boolean compareDate(String s, String e) {
		if(fomatDate(s)==null||fomatDate(e)==null){
			return false;
		}
		return fomatDate(s).getTime() >=fomatDate(e).getTime();
	}

	/**
	 * 格式化日期
	 * 
	 * @return
	 */
	public static Date fomatDate(String date) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return fmt.parse(date);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	public static Date fomatDateWithPattern(String date, String pattern) {
		DateFormat fmt = new SimpleDateFormat(pattern);
		try {
			return fmt.parse(date);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
	
	public static Date fomatDate2(String date) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		try {
			return fmt.parse(date);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	/**
	 * 校验日期是否合法
	 * 
	 * @return
	 */
	public static boolean isValidDate(String s) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			fmt.parse(s);
			return true;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return false;
		}
	}
	public static int getDiffYear(String startTime,String endTime) {
		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		try {
			long aa=0;
			int years=(int) (((fmt.parse(endTime).getTime()-fmt.parse(startTime).getTime())/ (1000 * 60 * 60 * 24))/365);
			return years;
		} catch (Exception e) {
			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
			return 0;
		}
	}
	  /**
     * <li>功能描述：时间相减得到天数
     * @param beginDateStr
     * @param endDateStr
     * @return
     * long 
     * @author Administrator
     */
    public static long getDaySub(String beginDateStr,String endDateStr){
        long day=0;
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date beginDate = null;
        Date endDate = null;
        
            try {
				beginDate = format.parse(beginDateStr);
				endDate= format.parse(endDateStr);
			} catch (ParseException e) {
				e.printStackTrace();
			}
            day=(endDate.getTime()-beginDate.getTime())/(24*60*60*1000);
            //System.out.println("相隔的天数="+day);
      
        return day;
    }
    
    /**
     * 得到n天之后的日期
     * @param days
     * @return
     */
    public static Date getAfterDaysDate(Integer days) {
        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, days); // 日期减 如果不够减会将月变动
        return canlendar.getTime();
    }

	/**
	 * 得到n天之后的日期
	 * @param days
	 * @return
	 */
	public static String getAfterDaysDateString(Integer days) {
		Calendar canlendar = Calendar.getInstance(); // java.util包
		canlendar.add(Calendar.DATE, days); // 日期减 如果不够减会将月变动
		Date date = canlendar.getTime();
		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String dateStr = sdfd.format(date);
		return dateStr;
	}
    
    /**
     * 得到n天之后是周几
     * @param days
     * @return
     */
    public static String getAfterDayWeek(Integer days) {
        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, days); // 日期减 如果不够减会将月变动
        Date date = canlendar.getTime();
        SimpleDateFormat sdf = new SimpleDateFormat("E");
        String dateStr = sdf.format(date);
        return dateStr;
    }

	public static Date getDateBegin(Integer offset){
		return fomatDate(getDay(getAfterDaysDate(offset)));
	}

	public static String getDateBeginString(Integer offset){
		return sdfTime.format(getDateBegin(offset));
	}


	public static void main(String[] args) {
//    	System.out.println(getDays());
//    	System.out.println(fomatDate("1990-01-08"));
//		System.out.println(getDateBegin(0));
//		System.out.println(getDateBegin(1));
//		System.out.println(getDateBeginString(1));
		String date = "2019/2/13 2019.2.13 2019年8月3日 2018、1、2";
		date = date.replaceAll("[/\\.年月、]","-").replaceAll("日", "");
		System.out.println(date);

		System.out.println(sdfDay.format(DateUtil.fomatDateWithPattern("2019.08.2","yyyy.M.d")));


    }

}
